Brazilian kefir: structure, microbial communities and chemical composition
Braz. j. microbiol
;
42(2): 693-702, Apr.-June 2011. ilus, graf, tab
Article
in English
| LILACS
| ID: lil-590016
ABSTRACT
Microbial ecology and chemical composition of Brazilian kefir beverage was performed. The microorganisms associated with Brazilian kefir were investigated using a combination of phenotypic and genotypic methods. A total of 359 microbial isolates were identified. Lactic acid bacteria (60.5 percent) were the major isolated group identified, followed by yeasts (30.6 percent) and acetic acid bacteria (8.9 percent). Lactobacillus paracasei (89 isolates), Lactobacillus parabuchneri (41 isolates), Lactobacillus casei (32 isolates), Lactobacillus kefiri (31 isolates), Lactococcus lactis (24 isolates), Acetobacter lovaniensis (32 isolates), Kluyveromyces lactis (31 isolates), Kazachstania aerobia (23 isolates), Saccharomyces cerevisiae (41 isolates) and Lachancea meyersii (15 isolates) were the microbial species isolated. Scanning electron microscopy showed that the microbiota was dominated by bacilli (short and curved long) cells growing in close association with lemon-shaped yeasts cells. During the 24 h of fermentation, the protein content increased, while lactose and fat content decreased. The concentration of lactic acid ranged from 1.4 to 17.4 mg/ml, and that of acetic acid increased from 2.1 to 2.73 mg/ml. The production of ethanol was limited, reaching a final mean value of 0.5 mg/ml.
Full text:
Available
Index:
LILACS (Americas)
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Braz. j. microbiol
Journal subject:
Microbiology
Year:
2011
Type:
Article
Affiliation country:
Brazil
/
Portugal
Institution/Affiliation country:
Universidade Federal de Lavras/BR
/
University of Minho,/PT
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